COP21 summit in Paris

Activists of global anti-poverty charity Oxfam, wearing masks depicting some of the world leaders French President Francois Hollande, Chinese President Xi Jinping, U.S. President Barack Obama, India’s Prime Minister Narendra Modi and German Chancellor Angela Merkel, stage a protest ahead of the 2015 Paris Climate Conference, known as the COP21 summit, in Paris, France, November 28, 2015. REUTERS/UNI